Hi CoinManTim,
Heres a mock up of the holey dollar and dump,

The currency determination described it as a normal $1 planchet with a holey dollar dump design. But wow it would be super cool if they used a bi metal foreign planchet, like the mistake roo coin.

Currency Determination >>
No.14
2013 Bicentenary of the Holey Dollar and Dump ‘C' Mintmark $1 Copper Aluminium and Nickel Coin
Reverse
A central circle enclosing a circle of raised beads, a representation of a crown and the inscriptions ‘NEW SOUTH WALES' and ‘1813'. Above the crown and to the left is the letter ‘C'. This letter denotes the Royal Australian Mint in Canberra. In the background there is a representation of a ribbon spiralling two pillars, a crown and a shield, all partially covered by the central circle. The design includes a circle of raised beads, immediately inside the outer rim of the coin and a representation of a festoon on the edge of the central circle. The design also includes the inscriptions ‘. HISPAN . ET IND . REX .', ‘.8R.T.H.' and a circle directly above the letter ‘M'.
Obverse
Consistent with all Australian legal tender coinage, an effigy of Her Majesty Queen Elizabeth II will appear on the obverse side of the coin together with the inscriptions ‘ELIZABETH II', ‘AUSTRALIA 2013', ‘. 1 DOLLAR .' and the initials of the designer Ian Rank-Broadley ‘IRB'. The obverse design includes raised beads inside the rim of the coin.
Specifications
14
$1
Standard composition: Copper, aluminium and nickel
Standard weight and allowable variation: (g)9.00 ± 0.28
Maximum diameter (mm):25.12
Maximum thickness (mm):2.80
Shape: Circular
Edge: Interrupted milling
A design consisting of Queen Elizabeth II and the following:
(a) ‘IRB';
(b) ‘ELIZABETH II';
(c) ‘AUSTRALIA 2013';
(d) ‘. 1 DOLLAR .';
all encircled by raised beads inside the rim of the coin
A design consisting of:
(a) a circle of raised beads, immediately inside the outer rim; and
(b) a central circle enclosing the following:
(i) a circle of raised beads;
(ii) a representation of a crown;
(iii) ‘NEW SOUTH WALES';
(iv) ‘1813'; and
(c) in the background and partially covered by the central circle:
(i) a representation of a ribbon spiralling two pillars;
(ii) a representation of a crown;
(iii) a representation of a shield; and
(d) a representation of a festoon; and
(e) the following:
(i) ‘. HISPAN . ET IND . REX .';
(ii) a circle directly above the letter ‘M';
(iii) ‘.8R.T.H.';
(iv) ‘C'
This design will also be made in a silver format too.